*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-size: 14px;
}

img{
    width: 100%;
}

:root{
    --primary-color:#ff434f;
    --secondary-color:#e3e3e3;
    --text-color-lightest:#e7e9ec;
    --text-color-darker:#2e2e2e;
    --text-color-dark:#494949;
    --text-color-gray:#8b8b8b;
    --text-color-dark-gray:#727272;
    --text-color-light-gray:#c6c6c6;
    --backdrop-color:rgba(42,42,42,0.69);
}

header{
    width: 100%;
    
    display: grid;
    padding: 0 40px;
    grid-template-columns: 1fr 2fr;
    align-items: center;
    position: relative;
    z-index: 200;
}
.sticky{
    background-color: white;
    position: fixed;
    box-shadow: 0 0 18px rgba(0, 0, 0, 0.2);
    animation: dropDown 1s ease-in-out forwards;
}
.sticky .logo,.sticky nav a,.sticky nav i{
    color: var(--text-color-darker);
}
@keyframes dropDown{
    from{
        transform: translateY(-100px);
    }
    to{
        transform: translateY(0);
    }
}


.logo{
    font-size: 24px;
    font-weight: 600;
    color: var(--text-color-lightest);
}

header nav{
justify-self: end;
}

header nav i{
    color: var(--text-color-lightest);
}

header nav a{
    color: var(--text-color-lightest);
    text-decoration: none;
    margin: 0 24px;
}

header .burger{
    display: none;
}

.glide{
    position: relative;
    top: -80px;
    z-index: 50;
}

.glide__slide img,.glide__slide video{
    width: 100vw;
    height: 100vh;
    object-fit: cover;
}

.slide-caption{
    position: absolute;
    z-index: 70;
    color: var(--text-color-lightest);
    text-align: center;
    max-width: 60vw;
}

.glide__slide{
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide-caption h1{
    font-size: 54px;
    font-weight: 600;
}

.slide-caption h3{
    font-size: 24px;
    margin: 48px 0;
}

.left{
    max-width: 80vw;
    text-align: left;
}

.slide-caption>*{
    opacity: 0;
}

.backdrop{
    background: var(--backdrop-color);
    z-index: 60px;
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    opacity: 0.5;
}

.explore-btn{
    padding: 14px 32px;
    background-color: var(--primary-color);
    border: 0;
    border-radius: 4px;
    color: var(--text-color-lightest);
    font-size: 18px;
    cursor: pointer;
    outline: none;
}

/* 内容区域，通用样式 */

.content-wrapper{
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}
section{
    display: grid;
    justify-items: center;
    max-width: 1180px;
    padding: 0 80px;
}
.section-bg{
    position: relative;
}
.section-bg::before{
    content: "";
    display: block;
    position: absolute;
    background-color: #f9fbfb;
    width: 100vw;
    height: 100%;
    z-index: -1;
}
.title1{
    font-size: 34px;
    color: var(--text-color-darker);
}

.title1::after{
    content: "";
    display: block;
    width: 80%;
    height: 4px;
    background-color: var(--primary-color);
    margin-top: 14px;
    transform: translateX(10%);
}

.intro{
    margin: 28px 0 60px 0;
    font-size: 18px;
    color: var(--text-color-dark-gray);
}

.features{
    display: grid;
    grid-template-columns: 1fr 1fr 1fr; 
    grid-template-rows: 126px 126px;
    column-gap: 5vw;
}
.feature{
    display: grid;
    grid-template-areas: 
    "icon title" 
    "icon content";
    grid-template-columns: 60px 1fr;
    grid-template-rows: 1fr 3fr;
}
.feature .iconfont{
grid-area: icon;
font-size: 34px;
color: var(--primary-color);
}
.feature-title{
    grid-area: title;
    font-size: 18px;
    color: var(--text-color-darker);
}
.feature-content{
    grid-area: content;
    color: var(--text-color-gray);
    margin-top: 8px;
}
.showcases{
    max-width: unset;
    padding: 0;
    padding-top: 72px;
}

.filter-btns{
    margin-top: 54px;
    margin-bottom: 38px;
}

.filter-btn{
    margin: 0 7px;
    background-color: var(--secondary-color);
    border: 0;
    color: var(--text-color-dark-gray);
    padding: 8px 18px;
    border-radius: 4px;
    cursor: pointer;
    transition: 0.4;
}

.filter-btn:focus,.filter-btn:active{
    outline: none;
}
.filter-btn.active,.filter-btn:hover{
    background-color: var(--primary-color);
    color: white;
}
.showcases .cases{
    width: 100vw;
}
.showcases .case-item{
    width: 25vw;
    height: 20vw;
    overflow: hidden;
}
.case-item img{
    height: 100%;
    object-fit: cover;
}

/* 服务流程 */
.service{
    padding-top: 131px;
}

.services {
    display: grid;
    grid-template-columns:1fr 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    column-gap: 38px;
    row-gap: 34px;
}

.service-item{
    display: grid;
    grid-template-areas: 
    "icon title"
    "icon content";
    grid-template-columns: 70px 1fr;
    grid-template-rows: 1fr 3fr;
    padding:24px;
    box-shadow: 0 0 18px rgba(0,0,0,0.06);
}

.service-item .iconfont{
    grid-area: icon;
    font-size: 42px;
    color: var(--primary-color);
    padding-top: 6px;
}

.service-item .service-item{
    grid-area: title;
    color: var(--text-color-darker);
    font-size: 24px;
}

.service-item .service-content{
    grid-area: content;
    color: var(--text-color-gray);
    line-height: 30px;
    font-size: 16px;
    margin-top: 8px;
}

/* 团队介绍 */
.team-intro{
    margin-top: 48px;
    padding-top: 62px;
    padding-bottom: 52px;
}
.team-members{
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
    column-gap: 24px;
    margin-top: 86px;
}
.team-member {
  background-color: white;
  box-shadow: 0px 0px 24px rgba(0, 0, 0, 0.2);
  text-align: center;
  padding-bottom: 28px;
  transition: 0.4s;
  display: grid;
  justify-items: center;
}

.profile-image{
    overflow: hidden;
}
.profile-image img{
    width: 100%;
    height: 264px;
    object-fit: cover;
    object-position: top center;
    /* 放大之后从上面开始摆放 */
}
.team-member .name{
    margin-top: 18px;
    font-size: 18px;
    font-weight: 500;
    color: var(--text-color-dark);
}
.team-member .position{
    color: var(--text-color-dark-gray);
    margin-top: 20px;
    margin-bottom: 18px;
}

.social-links{
    width: 100%;
    max-width: 200px;
    display: flex;
    justify-content: space-between;
    padding: 0 42px;
}
.social-links li{
    list-style: none;
}
.social-links li a{
    color: var(--text-color-dark);
    text-decoration: none;
}
.team-member:hover{
    transform: translateY(-20px) scale(1.05);
    box-shadow: 0 0 36px rgba(0, 0, 0, 0.1);
}

/* 数据部分 */
.data-section {
    max-width: unset;
    width: 100vw;
    height: 255px;
    background-image: url(./images/adult-business-computer-contemporary-380769.jpg);
    background-size: cover;
    background-position: center;
    display: grid;
    grid-template-columns: repeat(4, minmax(auto, 220px));
    justify-content: center;
    align-items: center;
    /* 子元素绝对定位时需要有相对的父级元素 */
    position: relative;
    z-index: 20;
  }

  .data-section::before {
    content: "";
    display: block;
    position: absolute;
    background-color: var(--backdrop-color);
    width: 100%;
    height: 100%;
    z-index: 1;
  }
  
  .data-piece {
    width: 250px;
    display: grid;
    grid-template-rows: repeat(3, 1fr);
    justify-items: center;
    color: white;
    position: relative;
    z-index: 40;
  }

  .data-piece .iconfont{
      font-size: 44px
  }

  .data-piece .num {
    margin-top: 7px;
    font-size: 41px;
    font-weight: 600;
  }
  
  .data-piece .data-desc {
    font-size: 18px;
    font-weight: 500;
  }

  /* 公司动态 */
.company-activities {
    margin-top: 80px;
  }
  
  .activities {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    column-gap: 24px;
  }
  
  .activity {
    box-shadow: 0px 0px 24px rgba(0, 0, 0, 0.1);
    padding: 24px;
    transition: 0.4s;
  }
  
  .act-image-wrapper {
    height: 255px;
    overflow: hidden;
    margin: -24px;
    margin-bottom: 0;
  }
  
  .act-image-wrapper img {
    min-height: 300px;
    object-fit: cover;
  }
  
  .activity .meta {
    margin-top: 20px;
    margin-bottom: 12px;
    color: var(--text-color-light-gray);
    font-size: 12px;
    display: flex;
  }
  
  .activity .meta > p:last-child {
    margin-left: 36px;
  }
  
  .act-title {
    color: var(--text-color-dark);
    font-size: 18px;
    margin-bottom: 16px;
  }
  
  .activity article {
    color: var(--text-color-gray);
    letter-spacing: 0.54px;
    line-height: 24px;
  }
  
  .read-more-btn {
    border: 0;
    color: white;
    background-color: var(--primary-color);
    padding: 6px 14px;
    margin-top: 24px;
    border-radius: 4px;
  }
  
  .activity:hover {
    transform: translateY(-20px) scale(1.05);
    box-shadow: 0px 0px 36px rgba(0, 0, 0, 0.1);
  }

  /* 底部信息 */
footer {
    margin-top: 124px;
    background-color: #181818;
    display: grid;
    justify-items: center;
    padding-top: 72px;
    padding-bottom: 24px;
  }
  
  .footer-menus {
    width: 100%;
    max-width: 1280px;
    display: grid;
    grid-template-columns: 2fr repeat(4, 1fr);
    padding: 0 80px;
    position: relative;
  }
  
  .menu-title {
    font-size: 16px;
    color: white;
    font-weight: 500;
    margin-bottom: 20px;
  }
  
  .contact-us {
    justify-self: start;
    color: var(--text-color-lightest);
  }
  
  .contact-us p:not(:first-child) {
    padding-bottom: 16px;
  }
  
  .menu-items li {
    list-style: none;
    padding-bottom: 8px;
  }
  
  .menu-items li a {
    text-decoration: none;
    font-weight: 300;
    color: var(--text-color-lightest);
  }
  
  .icp-info {
    margin-top: 24px;
    margin-bottom: 16px;
  }
  
  .icp-info,
  .rights {
    grid-column: 1 / -1;
    justify-self: center;
    color: white;
  }
  
.scroll-to-top{
      display: none;
      z-index: 300;
  }

  .scroll-to-top a {
    width: 32px;
    height: 32px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    position: fixed;
    bottom: 60px;
    right: 30px;
  }

  @media (max-width: 1100px) {
    header nav {
      display: none;
    }
  
    header .burger {
      display: block;
      position: relative;
      width: 20px;
      height: 6px;
      justify-self: end;
      cursor: pointer;
    }
  
    .burger-line1,
    .burger-line2,
    .burger-line3 {
      width: 20px;
      height: 2px;
      background-color: var(--text-color-lightest);
    }
  
    .burger-line1 {
      position: absolute;
      top: -6px;
    }
  
    .burger-line3 {
      position: absolute;
      top: 6px;
    }
  
    header.open nav {
      display: grid;
      position: absolute;
      left: 0;
      top: 0;
      width: 100vw;
      height: 100vh;
      background-color: white;
      grid-auto-rows: max-content;
      justify-items: end;
  
      padding: 0 40px;
      opacity: 0;
      animation: slideDown 0.6s ease-out forwards;
    }
  
    header.open nav > * {
      font-size: 18px;
      margin: 4px 0;
      opacity: 0;
      color: var(--text-color-darker);
      animation: showMenu 0.5s linear forwards 0.4s;
    }
  
    header.opem nav > i.fas {
      margin-top: 10px;
    }
  
    header.open .burger-line1,
    header.open .burger-line2,
    header.open .burger-line3,
    header.sticky .burger-line1,
    header.sticky .burger-line2,
    header.sticky .burger-line3 {
      background-color: var(--text-color-darker);
      transform: 0.4s ease;
    }
  
    header.open .burger-line1 {
      transform: rotate(45deg) translate(3px, 5px);
    }
  
    header.open .burger-line2 {
      transform: translateX(5px);
      opacity: 0;
    }
  
    header.open .burger-line3 {
      transform: rotate(-45deg) translate(3px, -5px);
    }
  
    header.open .logo {
      z-index: 40;
      color: var(--text-color-darker);
    }
  
    @keyframes slideDown {
      from {
        height: 0;
        opacity: 0;
      }
      to {
        height: 100vh;
        padding-top: 80px;
        opacity: 1;
      }
    }
  
    @keyframes showMenu {
      from {
        opacity: 0;
        transform: translateY(-1vh);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
  
    .service-item .service-title {
      font-size: 20px;
    }
  
    .service-item .service-content{
      font-size: 14px;
      line-height: 24px;
    }
  
    .team-members {
      grid-template-columns: repeat(2, 1fr);
      row-gap: 36px;
      column-gap: 6vw;
    }
  
    .activities{
      grid-template-columns: repeat(2, 1fr);
      row-gap: 36px;
    }
  
  }
  
  @media(max-width: 992px){
    .slide-caption h1 {
      font-size: 48px;
    }
  
    .slide-caption h3 {
      font-size: 18px;
    }
  
    .features, .services{
      grid-template-columns: repeat(2,1fr);
      grid-template-rows: unset;
    }
  
    .data-section {
      grid-template-columns: repeat(2,minmax(200px,auto));
      padding: 24px 0;
      height: auto;
      row-gap: 24px;
      background-size: 200%;
    }
  
    .showcases .case-item{
      width: calc(100vw/3);
    }
  }
  
  @media(max-width: 768px){
    section, .footer-menus{
      padding: 0 40px;
    }
  
    .footer-menus {
      grid-template-columns: 2fr repeat(2, 1fr);
      row-gap: 24px;
  
    }
  
    .contact-us {
      grid-row: 1 / 3;
    }
  
    .footer-menus {
      text-align: right;
    }
  
    .activities {
      grid-template-columns: 1fr;
  
      row-gap: 36px;
    }
  
    .data-section{
      grid-template-columns: 1fr;
      background-size: 300%;
    }
  
    .team-members {
      grid-template-columns: minmax(200, 400);
    }
  
    .features, .services{
      grid-template-columns: 1fr;
    }
  
    .showcases .case-item {
      width: calc(100vw /2);
      height: 30vw;
    }
  }
  
  @media(max-width: 576px){
    .slide-caption h1 {
      font-size: 28px;
    }
  
    .slide-caption h3 {
      font-size: 14px;
    }
  
    .explore-btn{
      font-size: 14px;
      padding: 8px 18px;
    }
  
    .showcases .case-item{
      width: 100vw;
      height: 60vw;
    }
  
    .footer-menus {
      grid-template-columns: 1fr;
    }
  
    .footer-menus{
      justify-self: start;
      text-align: left;
    }
  }
  